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Finding the Fourth Proportional to 1,555,605, 2,146,736.34 and 840,213

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Solution

The fourth proportional to 1,555,605, 2,146,736.34 and 840,213 is: 1,159,494.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,605 : 2,146,736.34 = 840,213 : x
  2. Step 2: Convert to fraction form
    1,555,605/2,146,736.34 = 840,213/x
  3. Step 3: Cross multiply
    1,555,605x = 2,146,736.34 × 840,213
  4. Step 4: Simplify right side
    1,555,605x = 1,803,715,780,440.42
  5. Step 5: Solve for x
    x = 1,803,715,780,440.42/1,555,605
  6. Step 6: Final answer
    x = 1,159,494.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.